also check your fuel recirculation system as they tend to get clogged and make the lower cylinders run rich to the point of pushing out raw fuel when the plug fouls because of it being stopped up
thankx for the responces,I did a compression check high was 140 down to 110 on the bottom cylinder. that plug looked like it may not be firing- looks new- no color at all. fuel was dripping out of the carbs. Ithink I will check the reeds next. thanks again,